Three new C-19 diterpene alkaloids, along with two known ones, were isolated from the roots of Aconitum brachypodum Diels. The structures of the new alkaloids were established as N-deethyl-3-Oacetylchasmaconitine (1), N-deethyl-3-O-acetylyunaconitine (2), and N-deethyl-3-O-acetyljesaconitine (3). Their structures were elucidated by extensive spectroscopic methods, including 1D (1H, 13C) NMR and 2D NMR (1H–1H COSY, TOCSY, ROESY, HSQC, and HMBC) experiments, as well as high-resolution electrospray ionization mass spectrometry (HR-ESI-MS).
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Acknowledgment
The authors are grateful to the Analytical Center of the Chemistry College of Henan University for measuring NMR, MS, and IR data.
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Published in Khimiya Prirodnykh Soedinenii, No. 1, January–February, 2018, pp. 117–119.
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Wang, X., Wang, D., Lai, G. et al. Diterpenoid Alkaloids from Aconitum brachypodum. Chem Nat Compd 54, 137–141 (2018). https://doi.org/10.1007/s10600-018-2276-4
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DOI: https://doi.org/10.1007/s10600-018-2276-4